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Details, datasheet, quote on part number:MT9080BPR
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| Part: | MT9080BPR |
| Category: | Communication => Network => TSI (Time Slot Interchange) => TDM/TSI Switches, Non-Blocking |
| Description: | Description = 2048 X 16 Bit Wide Variable Rate Digital Switch Matrix Module (SMX) For Digital Switching Matrices ;; Package Type = PLCC ;; No. Of Pins = 84 |
| Company: | Zarlink Semiconductor |
| Datasheet: | Download MT9080BPR datasheet File size : 431 kB |
| Request For quote: | Find where to buy MT9080BPR
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Datasheet text preview:
CMOS MT9080B SMX - Switch Matrix Module
Features
· · · · · · 16 bit wide data bus I/O 16 bit address bus Micropro c e s s o r Interface 2048 x 16 bit wide memory SRAM Interface s with Zarlink's MT9085B to form larger switch mitoses Var iable clock and frame rates
DS5140
ISSUE 4
March 1999
Ordering Information MT9080BP 84 Pin PLCC
-40°C to 70°C
Description
The MT9080B is a flexible memory module suitable for use as a basic building block in the construction of customized digital switching matrices. It can be configured as either a Data Memory or a Connection Memor y, and is designed to interface with Zarlink's MT9085B. Interface to the device is via 16 bit wide data and address busses. The MT9080B can operate with variable clock rates up to 16.7 MHz.
Applications
· · · Small and medium digital switch matrices Telephony equipment - PBX, CO equipment, digital cross connect, digital local loop Datacom equipment - access concentrators, Lan/Wan gateways
D0i/D15i 16
16 2048 x 16 16 Address MUX 11 11 Bit Counter WR ENABLE PRECHARGE Static Memory
16 D0o/ D15o
A0-A15
CRC
CD
Control Interface Counter Reset
ME
FP
CK
ODE DS
CS R/W
Mx
My
Mz
DTA
Figure 1 - Functional Block Diagram
2-101
MT9080B
CMOS
D15o
D14o
D13o
D12o
D11o
D10o
VDD
VSS
VSS
VSS
VSS
D9o 76
8
6
4
10
2
84
82
80
D8i D9i D10i D11i VSS D12i D13i D14i D15i VSS CK VDD VSS IC IC FP CS DS R/W DTA NC
78
D8o
D7i
D6i
D5i
D4i
D3i
D2i
D1i
D0i
12 14 16 18 20 22 24 26 28 30
74 72 70 68 66
VSS D7o D6o D5o D4o VSS D3o D2o D1o D0o VSS VDD CD A15 A14 A13 A12 A11 A10 A9 A8
84 PIN PLCC
64 62 60 58 56
46
48
34
36
38
40
42
44
50
32
52 A5
54
ODE
ME
IC
IC
VSS
VSS
Mx
My
Mz
A0
A1
A2
A3
A4
A6
NC
VDD
Figure 2 - Pin Connections
Pin Description
Pin # 1 2-5 Name VSS D0i-D3i Ground. Input/Microport Data Bus. This is part of a 16 bit data bus. The data bus is bidirectional in Connect Memory mode where it is typically interfaced to a microprocessor. In all other modes the data bus is an input. Data to be switched through the device is clocked in at this port. Ground. Input/Microport Data Bus. See description for pins 2-5 above. Ground. Description
6 7-10 11 12-15 16 17-20 21 22 23 24 25,26 27
VSS D4i-D7i VSS VSS VSS CK VDD VSS IC FP
D8i-D11i Input/Microport Data Bus. See description for pins 2-5 above. Ground. See description for pins 2-5 above.
D12i-D15i Input/Microport Data Bus. Ground.
Clock. Master clock input which is used to clock data into and out of the device. It also clocks the internal 11 bit counter. +5V supply input. Ground. Internal Connection. Should be tied to VSS for normal operation. Frame Pulse. An active low signal that serves as a synchronous clear for the internal 11 bit counter in all modes except Shift Register mode. The counter is cleared on a rising edge of CK. In the Shift Register mode, FP serves to align channel boundaries.
2-102
NC
NC
A7
CMOS
Pin Description
Pin # 28 Name CS Description
MT9080B
Chip Select. Active Low input. Selects the device for microport access in connect memory, data memory, external and shift register modes. Tying CS high will disable output data drivers (D0-D15o) in all modes except connect memory and shift register modes. Data Strobe. Active low input. Indicates to the SMX that valid data is present on the microport data bus during a write operation or that the SMX must output data on a read operation. In Connect Memory modes, a low level applied to this input during a write operation indicates to the SMX that valid data is present on the microport data bus. During a read operation the low going signal indicates to the SMX that it must output data on the microport data bus. In Data Memory and External modes, when DS is high, the output data bus D0o-D15o will be disabled. The input data bus D0i-D15i is not affected. The DS input has no effect on the input and output busses in Counter or Shift Register modes. Read/Write Enable. Data is written into the device when R/W is low and read from it when it is high. This control input is disabled in data memory and shift register modes. It should be tied to VSS or VDD in these modes. In counter and external modes, the state of R/W pin is clocked in with the rising edge of CK. The actual read or write operation will be implemented on the next rising clock edge. Data Transfer Acknowledge. Open drain output which is pulled low to acknowledge completion of microport data transfer. On a read of the SMX, DTA low indicates that the SMX has put valid data on the data bus. On a write, DTA low indicates that the SMX has completed latching the data in. No Connection. Ground. No Connection. Output Data Enable. Control input which enables the output data bus. Pulling this input low will place the data bus in a high impedance state. The level on this pin is latched by a rising edge of CK. The output drivers will be enabled or disabled with the rising edge in the next timeslot (see Fig. 24 for applicable timing in different modes). Message Enable. When tied high the data latched in on the address bus is clocked out on D0o-D15o. When ME is tied low, the contents of the addressed memory location will be output on the bus. The level on this pin is latched in with the rising edge of the clock. The actual mode change is implemented on the rising edge in the next timeslot. Refer to Figures 25 and 26 for more timing information. Mode X. One of three inputs which permit the selection of different operating modes for the device. Refer to Table 1 for description of various modes. Mode Y. See description for pin 37. Mode Z. See description for pin 37. No Connection. Internal Connection. Leave open for normal operation. Ground. Supply Voltage. +5V. No Connection.
29
DS
30
R/W
31
DTA
32 33 34 35
NC VSS NC ODE
36
ME
37 38 39 40 41, 42 43 44 45
Mx My Mz NC IC VSS VDD NC
2-103
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